Machine particularly for producing vulcanized rubber tubes

Abstract

The machine for producing vulcanized rubber tubes comprises two mutually opposite head sections, each having a base that supports two spindles. At least a first one of the two head sections has motorized spindles. A corresponding tubular core is rotated constantly, during operation, between the mutually opposite spindles of the two head sections and is supported, along its span, by supporting elements that are fixed to a supporting frame interposed between the two head sections. The two motorized spindles connected to the first head section are each supported together with a respective drive unit on a first slider that is movably coupled to the corresponding base. The slider is inclined with respect to a horizontal plane such that its upper part is exposed frontally to the operator.

What is claimed is: 
     
       1. Machine particularly for producing vulcanized rubber tubes, comprising two mutually opposite head sections, each having a base supporting at least one pair of spindles, at least a first one of said two head sections having motorized spindles, the mutually opposite spindles of said two head sections rotating, during operation, a corresponding tubular core supported, along its span, by supporting elements fixed to a supporting frame interposed between said two head sections, wherein each one of said pairs of motorized spindles is supported, together with its drive unit, on a corresponding first slider which is movably coupled to the corresponding base, said first slider being inclined with respect to a horizontal plane such that its upper part is exposed frontally to the operator. 
     
     
       2. Machine according to claim 1, further comprising first actuator means adapted to move said first slider in a direction that is parallel to the longitudinal extension of said core. 
     
     
       3. Machine according to claim 2, wherein said first actuator means comprise a hydraulic cylinder rigidly supported by the corresponding base. 
     
     
       4. Machine according to claim 1, wherein said first slider is constituted by a first plate whereon the frames related to said two motorized spindles are fixed directly, a second plate being fixed above said frames, the drive unit of said two motorized spindles being in turn fixed to said second plate. 
     
     
       5. Machine according to claim 1, wherein said first slider runs along guides, at least one of said guides being constituted by a pivot fixed to said base, tubular bushes being slideable along said pivot, said bushes being in turn fixed to said first slider, said first slider being rotatable about said pivot in a maintenance and/or repair configuration. 
     
     
       6. Machine according to claim 4, wherein said drive unit comprises two electric motors, each connected to one of said motorized spindles by means of a belt. 
     
     
       7. Machine according to claim 4, wherein said drive unit comprises a single electric motor connected to both of said spindles of said first head section by means of belts. 
     
     
       8. Machine according to claim 1, wherein the spindles of a second one of said two head sections are arranged in pairs and are free, each spindle being supported by a corresponding second slider slidingly coupled to the corresponding base. 
     
     
       9. Machine according to claim 6, wherein each one of said second sliders is constituted by a corresponding third plate arranged on a substantially horizontal plane. 
     
     
       10. Machine according to claim 8, wherein each one of said second sliders is moved by second actuator means. 
     
     
       11. Machine according to claim 10, wherein said second actuator means are constituted by hydraulic cylinders, each adapted to move a corresponding free spindle in a direction that is substantially parallel to the longitudinal extension of said core. 
     
     
       12. Machine according to claim 8, wherein each pair of said free spindles comprises one spindle having a frame fixed to a corresponding third plate that slides directly on the corresponding base, and another free spindle having a corresponding third plate slideable along a fourth plate fixed above the frame of said one free spindle. 
     
     
       13. Machine according to claim 12, wherein it comprises stroke limiter means for said free spindles. 
     
     
       14. Machine according to claim 13, wherein said stroke limiter means comprise a raised portion protruding below said third plate that slides directly on the base, said raised portion abutting directly against said base.